Mechanical shovel



Mar. '13, 1923. S. HOAR.

MEQIHANlCAL lSHOVELl @n o o o a o N IO o o o a l. w w o a w c o .m o @Nc a e e W el`l o e b2@ ww s w W r H..,. a, hh F I m, bm.. .9 o\ E Mar.13, 1923. 1,448,537.

S. HOAR.

MECHANICAL SHOVEL.

HLED SEPT. 15, 1920.

Patented Mar. i3, i923.

f 13a; TATS SAMUEL HOAR, OF VIRGINIA., MINNESOTA.

MECHANICAL srrovnr.. v f

Application filed September 15, 1920. Serial No. 410,416.

To all whom t may concern.'

Be it known that I, SAMUEL Horan, a citizen of the United States,residing at Virginia, in the county of St. Louis and State of Minnesota,have invented certain new and useful Improvements in Mechanical Shovels,of which the following is a specification, reference being had thereinto the accompanying drawing.

This invention relates to mechanical shovels and the embodiment hereillustrated and described is especially designedfor tunneling purposeswhere room for operating the device maybe considerably restricted l5such as experienced in coal, iron or lother mines andeforwwhich purposemy present invention is particularly designed. e

It is evident thatthis or a slightly modified form may 'be used withequally good results where open shoveling is required and such machinesemployed. y

The principal object of the invention is to provide amore practicalmechanical shovel than heretofore known and one requiring as littlespace as Apossible in lwhich to operate. e w

Another object of the invention is to provide a combination dipperfstickwhich results in novel flexibility of the dipper.

Still other objects and advantages of the novel combination of partswill appear in the further description of the invention.

In the accompanying drawings forming part of this application andinwhich like reference characters represent like parts:

Figure 1 is a side elevation partly in section of .one embodiment of myinvention;

Fig. 2 is a rear elevation, partly in section, ofvFig. l;

Fig. 3 is a top plany view, partly broken away, of the shovel with thedipper in the position illustrated in Fig. 4; and

Figure' 4 is a side elevation, partly in section, of the shovel with thedipper in position for discharging its load into a tram car. l

1 represents a car mounted upon four wheels 2 2 and 3 3. the latterorrear wheels being considerably largerkin diameter than the .former forthe upurpose of producing aforwardr downward inclination to the body ofthe jcair, the particular object of which will appear later.

A turntable having cooperative interlock-A ing parts 4 and 5 is mountedupon the car body and supports the adjustable superstructure, the 'floorof which is illustrated at G. rlhis superstructure may be of anyvdesired form of fabrication to provide the necessary strong support forthe operating parts lof the machine.y l,

have shown the upright ends of the superstructure as being composed ofangle bars 7 7 at the rear end and 8 8 at the forward end, upon theupper extremities 'of 65 which is supported the inclined shovel carriagetrack and which comprises two spaced channel bars 9 9 facing inwardlytowards each other kand which are rigidly fixed in the upper ends of theangles.

Intermediate of the channels 9 9 and reciprocally carried therein is theshovel carriage l0, it being provided with preferably three pairs ofrollers or wheels ll which travel within the channels 9 9 as clearlyshown in Figure 2 of the drawings,said wheels or rollers ll being thefull depth of the channels to prevent undesirable vertical movement ofthe carriage.

The carriage l0 is of fabricatedconstruction having the forward endthereof extending above and beyond the foremost pair of rollers 11, and,pivotally mounted in such extension, as at l2, is the auxiliary di pperstick 13. The auxiliary stick 13 extends rearwardly to a distance'approximately equal to the length of the carriage l0 and is attached tothe rear end of said carriage by a suitable line or `chain let, and inthe rear'end of the auxiliary dipper stick is mounted a transverselydisposed roller l5, which is engaged by the clipper' manipulating line16 when the dipper is in operation.

On the opposite end of the auxiliary dipper stick l3'is pivotallymounted as at 17 the principal dipper sticklS which latter carries uponits forward end the iixed dipper 19 and is manipulated by the line 16Vbeingk attached to the opposite end 4as at 20. A single line only isrequired for operating the dipper as the material engaging yend thereofis at all times `heavier than the handle end and willY naturally go toits work by gravity. However a second line 2l is required for theoperation of the carriage l() and which secondlinel is attached at oneend tothe kcarriage as at22 and passes to and around a suitable shea've23 adiacent the rear end of the superstructure of the vehicle and kfromthere to and` around the -driving drum 24;, while the vopposite endleadsforwardly to and aroundthesheave 25'up to wardly upon one portionof the line simultaneously with the slacking off of theother portion andwhereby alternate reverse rotation' of the drum 24 willl producereciproca tion of the carriage. A sheave 28 is inf stalled centrally inthe rearjof the"super` structure and over which the dipper manipulatingline 16 passes to a suitablewinding drum 29. n

I have shown what are commonly known as Dake air` engines for furnishingpower i to the various drums and 'operatingmechanism of the shovel,butit is' evident that their applicationor combinationv with the'specific structure does not enter into the in` vention as electric orother forms ot motors lmay be employed when desired.

The turntable upon which, the Isuperstruc-v ture is mounted, is, asbefore stated, 'com posed 'of thev two interlocking ring sections 4 `and5A which are cooperatively engaged with the base "ring or section 30,which lat-r ter is fixed to the chassis of the vehicle, there being twosets of bars, the rings 4 and 30, and one intermediate of ythe rings 4and 5, thus providing'a simple durable anti-friction bearing lfor thesuperstructure. The gear mechanism for operat ing said superstructure isillustrated at 32, 33, 34 and 35, the speciiic arrangement of which doesnot constitute part of my .present 'n invention.

` shovel. f

The seat lfor the operator is shown at 36 as conveniently located uponthe side of the superstructure and each motor is operated in eitherdirectio'nby a `single lever as indicated at 37, there being' three otsuch motors in the machine, one for rotating the superstructure, one forreciprocating the carriage and one 38 represents a able connection forair hose for supplying power to the motors and I have shown at 39 aconvenient form of rail anchor or holding means for the rear end of theshovel dure v ing its operation to prevent liftingefrom the track.

It Willfbe noted that the free end of the v auxiliary dipper stick 13 islin noy way directly attached to the y, shovel manipulating line 16,vbut simplybears upwardly against the line vwhenthe shovel is in the actof digging, and, when the shovel isdrawn rearwardly,l as shown in dottedlines Figure 1,

in the act of digging, lshould it become ex cessively engaged duringsuchact, a .con-

l. tinued draft upon the line 16 Y Y will tend to force downwardly lthevtree end of the one intermediate of.

' dipper for manipulating thek suitable air line to asuit- Y 1,448,5ef:l

auxiliary dipper stick and thus cause a litting effect upon the dipperwhich will tend to free its hold though not prevent its subsequentadvancement in working, or, in othervwords, the dipper stick, having twofulcrumed points spaced from each other and one being automaticallyoperated as above described, provides an extremely desirable flexibilityof the dipper while at work. 'I

In respect to the inclination ot the car or vehicle 1 upon wheelsgreater in diameter in the rear than in the forward end there of, itwill be noted lthat when the dipper is swung about with its load uponsuch in clined vehicle it will be simultaneously elevated and turned,thus enabling the dipper to discharge its load inthe highest tramcarpossible with the minimum elevation of the dipper, as 'itis'unders'toodl that this shovel is designed particularly for tunnellwork where spacev both vertically andA hori- Zontally is extremelylimited. l

Having thus described my invention what I rclaim and desire to securebyQLetters Patent,is--V ,4 f

1. In a mechanical shovel, the combination withk aportable inclinedturntable, of a superstructure supported upon the turntable, an inclinedtrack upon ythe superstructure, a reciprocable carriage upon the track,an rauxiliary dipper stick pivotally vcarried upon the carriage,gavdipper stick and dipper carried 'upon the l.auxiliary stick, and'meansfor simultaneously operating both dipper sticks." l x l.

2;'In a'mechanical shovel, the combinae tion with a vehicle, having aturntablethere upon, .of .ay superstructure supported upon theturntable', an inclined track carried by thesuperstructure, a reciprocalcarriage carried by 'the superstructure, an j auxiliary f stickpivotally carriedu'pon the carrlage, a dipper `stick and dipper carrieduponv the auxiliary stick, "and a single -line forsimultaneouslyoperating both 'dipper sticks. v s 1 3.1 In a mechanical shovel, the"combination with a vehicle having a turntable there upon, of asuperstructure supported' `upon the turntable, a carriagereciprocally'carried in the superstructure, an'auxiliary" dipper stickpivotally carried upon thel carriage, a dipper stick and dipperI carriedupon the auxiliary stick, independent means for operating the ycarriageand the superstructure, anda single linefor simultaneously operatbothdippersticks. f l

4'. lIn combination a vehicle, a superstruc `ture upon the vehicle, an',auxiliary-dipper stick pivotally4 carriedby, the superstructure,' adipper 'stickand dipper pivotally carried by theauxiliary dipper stick,.a single f operating-.linee,attached to Vr*the* combined dipperandstick, and means carried yby the auxiliary stick engaging said lineand operating the auxiliary stick for the purpose described.

5. In a mechanical shovel the combination with a portable vehicle, of anauxiliary dipper Stick pivotally carried thereupon,

Said pivotal point being spaced from the lower end of the stick, acombined dipper stick and dipper pivotally carried upon the extremelower end of the auxiliary dipper stick, a single operating linepermanently attached to the clipper carrying stick, and the free end ofthe auxiliary stick engaging said line for the purpose described.

6. In a mechanical shovel, the combination with a portable vehicle, ofan auxiliary dipper stick pivotally and reciprocably carried thereupon,'said pivotal point being spaced from the lower end of the stick, acombined dipper stick and dipper pivotally carried upon the extremelower end of the auxiliary dpper Stick, a single. operating lineattached to the dipper carrying stick and engaging the free end of theauxiliary stick, means for limiting the upward motion of the upper endof the auxiliary stick, and means on the vehicle for operating the line,substantially as described.

In testimony whereof I hereunto aiiix my signature in the presence oftwo witnesses. SAMUEL HOAR. Witnesses:

D. GREELEY, ESTHER DosEY.

